<span> let x = # of adult tickets
sold, thus the # of children tickets
= 70-x</span>
<span> 7.5x + 5(70-x) = 450</span>
<span> ^ 7.5x + 350 -5x = 450</span>
<span> ^ 2.5x = 450-350= 100</span>
<span> x = 40 adults
tickets thus
70—40 = 30 children tickets</span>
Answer:
20
Step-by-step explanation:
All I did was add 15 and 5 which equals 20 which is the correct answer
Answer:
O The number of ounces is graphed on the y-axis, and the number of quarts is graphed on the x-axis.
Step-by-step explanation:
This was a multiple choice question right?
I believe O The number of ounces is graphed on the y-axis, and the number of quarts is graphed on the x-axis. is the answer.
My teacher taught me a simple equation for these types of problems:
(percent of solution × amount of solution) + (percent of solution × amount of solution) = (percent of solution × total amount of solution)
in simple terms: %amount + %amount = %total amount
We know don't know how much gallons of 60% solution we need so it will be represented as x. We dont know the total amount either so it would have to be both solutions added together so 50 + x. Now lets solve:
(0.60)(x) + (0.24)(50) = (0.50)(50 + x) simplify/ distribute
0.6x + 12 = 25 +0.5x get all xs on one side and numbers on other
0.1x + 12 = 25
0.1x = 13 divide both sides by 0.1 to find x
x = 130
You need 130 gallons of 60% solution.
Answer:
Emanuel made huis mistake in first step and step 1 is incorrect.
Step-by-step explanation:
The given expression is
(\frac{3}{5})(\frac{4}{9})(-\frac{1}{2})(
5
3
)(
9
4
)(−
2
1
)
It can be written as
\frac{3}{5})(\frac{4}{9})(\frac{-1}{2}
5
3
)(
9
4
)(
2
−1
Step 1: (\frac{(3)(4)(-1)}{(5)(9)(2)})(
(5)(9)(2)
(3)(4)(−1)
)
Emanuel used negative sign with both numbers 1 and 2. Therefore the first step of Emanuel is incorrect.
Step 2: \frac{-12}{90}
90
−12
Step 3: \frac{-2}{15}
15
−2
Therefore Emanuel made huis mistake in first step and step 1 is incorrect
Step-by-step explanation:
all the steps are given below
